<template>
  <el-container class="home-container">
<!--    头部区域-->
    <el-header>
      <div>
        <img src="../assets/logo.png" width="30">
        <span>电商后台管理系统</span>
      </div>
      <el-button type="info" @click="signOut">退出</el-button>
    </el-header>
<!--    页面主体-->
    <el-container>
<!--      侧边栏-->
      <el-aside :width="isCollapse?'64px':'200px'">
        <div class="toggle-button" @click="toggleCollapse">|||</div>
<!--        侧边菜单-->
        <el-menu background-color="#333744" :default-active="activePath" text-color="#fff" active-text-color="#409eff" unique-opened :collapse="isCollapse" :collapse-transition="false" router>
          <el-submenu v-for="item in menuList"  :key="item.id" :index="item.id+''">
<!--            一级菜单模板区域-->
            <template slot="title">
<!--              图标-->
              <i :class="iconsObj[item.id]"></i>
<!--              名称-->
              <span>{{item.authName}}</span>
            </template>
<!--            二级菜单模板区域-->
            <el-menu-item :index="'/'+subitem.path" v-for="subitem in item.children"  :key="subitem.id" @click="saveNavState('/'+subitem.path)">
              <template slot="title">
                <i class="el-icon-menu"></i>
                <span>{{ subitem.authName }}</span>
              </template>
            </el-menu-item>
          </el-submenu>
        </el-menu>
      </el-aside>
<!--      右侧内容主体-->
      <el-main>
<!--        路由占位符-->
        <router-view/>
      </el-main>
    </el-container>
  </el-container>
</template>

<script>
export default {
  created () {
    this.getMenuList()
    this.activePath = window.sessionStorage.getItem('activePath')
  },
  name: 'Home',
  data () {
    return {
      // 菜单列表数据
      menuList: [],
      // 图标
      iconsObj: {
        125: 'iconfont icon-user',
        103: 'iconfont icon-tijikongjian',
        101: 'iconfont icon-shangpin',
        102: 'iconfont icon-danju',
        145: 'iconfont icon-baobiao'
      },
      // 是否折叠菜单
      isCollapse: false,
      // 当前的激活的菜单路径
      activePath: ''
    }
  },
  methods: {
    signOut () {
      // 清除token
      window.sessionStorage.removeItem('token')
      // 退回登录页
      this.$router.replace('/login')
    },
    // 获取菜单列表
    async getMenuList () {
      const { data: result } = await this.$http.get('menus')
      if (result.meta.status !== 200) return this.$message.error(result.meta.msg)
      this.menuList = result.data
    },
    // 折叠菜单
    toggleCollapse () {
      this.isCollapse = !this.isCollapse
    },
    // 保存激活当前菜单选项
    saveNavState (activePath) {
      window.sessionStorage.setItem('activePath', activePath)
      this.activePath = activePath
    }
  }
}
</script>

<style scoped lang="less">
.home-container{
  height: 100%;
}
.el-header{
  background-color: #373d41;
  display: flex;
  justify-content: space-between;
  //padding-left: 0;
  align-items: center;
  color: #fff;
  font-size: 20px;
  > div{
    display: flex;
    align-items: center;
    span{
      margin-left: 15px;
    }
  }
}
.el-aside{
  background-color: #333744;
  .el-menu{
    border-right: 0;
  }
}
.el-main{
  background-color: #EAEDF1;
}
.iconfont{
  margin-right: 10px;
}
.toggle-button{
  background-color: #4a5064;
  font-size: 10px;
  line-height: 24px;
  color: #fff;
  text-align: center;
  letter-spacing: 0.2em;
  cursor: pointer;
}
</style>
